** No longer affects: gnocchi

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https://bugs.launchpad.net/bugs/1517839

Title:
  Make CONF.set_override with parameter enforce_type=True by default

Status in Aodh:
  In Progress
Status in Ceilometer:
  In Progress
Status in Cinder:
  In Progress
Status in cloudkitty:
  Fix Released
Status in Designate:
  Fix Released
Status in Freezer:
  In Progress
Status in Glance:
  Invalid
Status in glance_store:
  In Progress
Status in heat:
  Fix Released
Status in Ironic:
  Triaged
Status in Karbor:
  Fix Released
Status in OpenStack Identity (keystone):
  Fix Released
Status in kolla:
  New
Status in Magnum:
  In Progress
Status in Manila:
  Fix Released
Status in Murano:
  Fix Released
Status in neutron:
  Won't Fix
Status in OpenStack Compute (nova):
  Fix Released
Status in octavia:
  New
Status in oslo.config:
  In Progress
Status in oslo.messaging:
  Fix Released
Status in Quark: Money Reinvented:
  New
Status in Rally:
  Fix Released
Status in senlin:
  New
Status in tacker:
  In Progress
Status in watcher:
  Fix Released

Bug description:
  1. Problems :
     oslo_config provides method CONF.set_override[1] , developers usually use 
it to change config option's value in tests. That's convenient .
     By default  parameter enforce_type=False,  it doesn't check any type or 
value of override. If set enforce_type=True , will check parameter
     override's type and value.  In production code(running time code),  
oslo_config  always checks  config option's value.
     In short, we test and run code in different ways. so there's  gap:  config 
option with wrong type or invalid value can pass tests when
     parameter enforce_type = False in consuming projects.  that means some 
invalid or wrong tests are in our code base.

     [1]
  https://github.com/openstack/oslo.config/blob/master/oslo_config/cfg.py#L2173

  2. Proposal
     1) Fix violations when enforce_type=True in each project.

    2) Make method CONF.set_override with  enforce_type=True by default
  in oslo_config

   You can find more details and comments  in
  https://etherpad.openstack.org/p/enforce_type_true_by_default

  3. How to find violations in your projects.

     1. Run tox -e py27

     2. then modify oslo.config with enforce_type=True
        cd .tox/py27/lib64/python2.7/site-packages/oslo_config
        edit cfg.py with enforce_type=True

  -    def set_override(self, name, override, group=None, enforce_type=False):
  +    def set_override(self, name, override, group=None, enforce_type=True):

    3. Run tox -e py27 again, you will find violations.

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